Patent No. EP2981275 (titled "Lozenge For Treating A Sore Throat, Hoarseness, And Associated Dry Cough And For Treating Inflammatory Diseases Of The Oral Cavity And Of The Pharynx") was filed by Boehringer Ingelheim on Mar 31, 2014. The application was issued on Jan 9, 2019.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| STREHLKE | Oct 9, 2019 | VON ROHR PATENTANWALTE PARTNERSCHAFT MBB |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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